:root{
  --primary:#0056b3;
  --secondary:#00C7FF;
  --text:#1d1d1f;
  --bg:#ffffff;
}

/* RESET */
*{
  margin:0;
  padding:0;
  box-sizing:border-box;
  -webkit-tap-highlight-color:transparent;
}

/* Accessibility: Focus State */
a:focus,
button:focus {
  outline: 3px solid var(--primary);
  outline-offset: 3px;
}

body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  background:var(--bg);
  color:var(--text);
}

/* ===== GLOBAL HEADER ===== */
.global-header{
  width:100%;
  padding:22px 6%;
  display:flex;
  justify-content:space-between;
  align-items:center;

  flex-wrap:nowrap;          /* prevent wrapping */
  white-space:nowrap;        /* prevent new line */

  background:#ffffff;

  position:sticky;           /* sticky header */
  top:0;
  z-index:9999;

  transition:box-shadow .3s ease, padding .3s ease;
}

/* on scroll */
.global-header.scrolled{
  box-shadow:0 6px 20px rgba(0,0,0,.08);
  padding:16px 6%;
}

/* ===== LOGO LINK ===== */
.logo-link{
  display:inline-flex;
  align-items:center;
  text-decoration:none;
  flex-shrink:0;
}

.logo-link:visited,
.logo-link:hover,
.logo-link:active{
  text-decoration:none;
}

/* ===== LOGO ===== */
.logo{
  font-size:1.7rem;
  font-family: "Arial", sans-serif;
  font-weight:900;
  letter-spacing:-1px;

  background:linear-gradient(
    90deg,
    #1d1d1f,
    var(--primary),
    var(--secondary),
    #1d1d1f
  );
  background-size:300%;
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;

  animation:shine 6s linear infinite;
}

@keyframes shine{
  to{ background-position:300%; }
}

/* ===== HEADER NAV ===== */
.header-nav{
  display:flex;
  gap:25px;
}
.header-nav a{
  text-decoration:none;
  color:var(--text);
  font-weight:600;
  font-size:0.95rem;
  transition:color .3s;
}
.header-nav a:hover{
  color:var(--primary);
}

/* ===== GLOBAL FOOTER ===== */
.global-footer,
.global-footer a,
.global-footer .copy{
  color:#000000;
}
.global-footer a{
  font-size:0.85rem;
}

/* ===== MOBILE ===== */
@media (max-width:600px){
  .global-header{
    padding:16px 5%;
  }
  .global-header.scrolled{
    padding:14px 5%;
  }
  .logo{
    font-size:1.45rem;
  }
  .header-nav{
    gap:15px;
  }
}